Why is electrical energy usually transmitted at high voltage?*1 pointAs little energy as possible is wasted in the transmission cables.The current in the transmission cables is as large as possible.The resistance of the transmission cables is as small as possible.The transmission system does not require transformers.

Electrical energy is usually transmitted at high voltage to ensure as little energy as possible is wasted in the transmission cables.

Here's why:

1. When electrical energy is transmitted at high voltage, the current in the transmission cables is reduced. This is because Power (P) = Voltage (V) x Current (I). So, if the voltage is increased, the current can be decreased for the same amount of power.

2. The power loss in the cables is given by the formula Ploss = I^2 x R, where I is the current and R is the resistance of the cables. So, by reducing the current (by increasing the voltage), the power loss in the cables is minimized.

3. This is why transformers are used in the transmission system. They step up the voltage for transmission (reducing the current and hence the power loss) and then step it down again for domestic or industrial use.

So, the correct answer is "As little energy as possible is wasted in the transmission cables."

Electrical energy is usually transmitted at high voltage to ensure as little energy as possible is wasted in the transmission cables.

Here's why:

1. When electrical energy is transmitted at high voltage, the current in the transmission cables is reduced. This is because Power (P) = Voltage (V) x Current (I). So, for a given power, if the voltage is increased, the current decreases.

2. The power loss in the cables due to heating is given by the formula Ploss = I^2 x R, where I is the current and R is the resistance of the cables. So, if the current is reduced, the power loss due to heating is also reduced.

3. Therefore, by transmitting electrical energy at high voltage, the current in the cables is reduced, which in turn reduces the power loss due to heating. This means that as little energy as possible is wasted in the transmission cables.

4. However, it's important to note that this high voltage needs to be stepped down to safer levels before it reaches consumers. This is done using transformers in the transmission system. So, the statement that the transmission system does not require transformers is incorrect.